Okay this is also another major problem I am having. Sorry for posting another post right after posting another one but I didn't want to combine them both.

Okay so I'm doing my project, save it a few times to be safe, maybe hit build a couple times too to check it out, and then hit f5 for a preview. Everything is going alright. Then, I add some more stuff, hit f5, and realize my changes were not made!

To test this out, I even opened a new project and hit f5, and it kept loading the same thing!

Lets say I add buttons to my form, I hit f5, they don't show up on the preview!

HELP!